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4:1 Current Balun using Ferrite rods

Guanella 4:1 Current Balun using Ferrite rods by ZS1JHGMost articles on building the Guanella 4:1 Current balun use one or two toroids. For the range 1.8 MHz to 28 MHz
post 04 Jan 2021

Toroid & balun Links


1:1 Balun for HF wire
1:1 50 ohm balun for use on HF horizontal wire dipoles. It uses an AM radio ferrite rod, with 3x14 turns of wire. 10-14 turns should be good for 2-30MHz. 18SWG enammeled copper wire

1:1 Coaxial Balun
A balun with impedance transformer is required to avoid minimum reflection losses arising from mismatch of impedance. This includes the 180 phase shifter

1:9 Antenna balun
I had this feeling the 1:4 balun was not presenting the greatest match to the open feed line. After I built and tried this 1:9 balun the autotune antenna tuner was able to

1:9 Antenna Long Wire con Balun 9:1
Vi occorre un antenna semplice e di sicuro funzionamento, in pochi minuti potrete costruirvi una Long Wire (filo lungo) o corto, fate voi